DNA Molecular Typography (IMAGE)

Boston University

DNA Molecular Typography

Caption

The many topographical levels of a chromosome. Genomic DNA is shown streaming out from a chromosome (left), progressively unfolding as chromatin, the 30-nm filament, nucleosomes, the DNA double helix, and finally the letters representing the nucleotide sequence. Although it is the molecular topography of the DNA helix that is recognized by proteins, current methods of genome analysis mostly focus on the order of nucleotides.

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NHGRI

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